ARO DR025B Benutzerhandbuch - Seite 5

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DISASSEMBLY/ASSEMBLY

INSTRUCTIONS

M22

Unthread and remove adapter (40) -LEFT HAND THREADS

- releasing bearing (42).

To disassemble drive assembly, unthread lock nut (74) -

LEFT HAND THREADS -and pull drive assembly from hous-

ing (56 or 78). Do not disassemble further unless damage is

evident. NOTE: Drive assembly contains 22 small balls which

will fall out if drive assembly is disassembled.

RIGHT-ANGLE ASSEMBLY

(LIGHT DUTY)

Lubricate bearings upon assembly.

Assemble bearing (71) and gear (70, 75, 81, 87, 89 or 96) to

shaft (72 or 80).

Assemble gear and components to lock nut (74) securing

balls (73) in groove in gear.

Assemble lock nut (74) to housing (56 or 78) - LEFT HAND

THREADS.

Assemble bearing (42) and lock nut (41) to body, securing with

adapter (40) - LEFT HAND THREADS.

Assemble bearing (54) to pinion (55).

Assemble pinion to housing (56 or 78).

Assemble housing (56 or 78) to body (51) to seat needle bear-

ing. Unthread and remove body. NOTE: Bearing is to be lo-

cated .525" from end of housing (56 or 78)(see illustration

below).

Assemble shims (52 and 53) to body.

Assemble housing (56 or 78) to body (51) - LEFT HAND

THREADS.

Assemble coupling (39) to pinion and assemble "0" ring (91)

to adapter. NOTE: "0" ring is to be free of oil and grease. As-

semble right-angle section to tool, securing with lock nut (41)

- LEFT HAND THREADS.

GEARING DISASSEMBLY

Remove right-angle section from tool.

Remove ring gear (24 or 29) using a wrench on flats.

Remove snap ring (28) and washer (27).

Remove spindle(s) and gears from ring gear. NOTE: Keep

gears grouped with mating spindle when disassembling

double reduction gearing.

Do not remove bearing (26) or spacer (25) unless damage is

evident.

To remove bearing (26) and spacer (25) from ring gear, press

on spacer (25) from inside splined end of ring gear.

Do not remove gear (37) from carrier assembly unless dam-

age is evident. Gear (37) is press fit onto carrier assembly.

GEARING ASSEMBLY

Assemble spacer (25) into ring gear.

Press bearing (26) into ring gear. NOTE: Press on outer race

of bearing and press to shoulder of ring gear.

Coat shafts of spindle with ARO 33153 grease.

Assemble gears to shafts of mating spindle,

Assemble carrier assembly to spindle assembly for models

with double reduction gearing.

Lubricate sets of gears liberally with ARO 33153 grease (see

"Routine Lubrication Requirements", page 3).

Assemble spindle(s) and gearing into ring gear. Rotate

spindle and gears to align gear teeth with splines of ring gear.

Assemble washer (27) to spindle, securing with snap ring

(28).

Thread ring gear (24 or 29) to tool, tightening with wrench on

flats.

Assemble right-angle section to tool.

MOTOR DISASSEMBLY

Remove right-angle section and gearing from tool.

Remove spacer (22) and "0" ring (21).

Tap front edge of housing to remove motor assembly. Locat-

ing pin (23) should also come out.

Tap splined end of rotor (17) with a soft face hammer; motor

will come apart. NOTE: Bearing (20) is light press fit on rotor.

Remove end plate (15) and bearing (14) from rotor.

MOTOR ASSEMBLY

Lubricate bearing (14) with ARO 33153 grease.

Assemble bearing (14) to end plate (15). NOTE: Press on out-

er race of beating.

Assemble end plate (15) to rotor. NOTE: Press on inner race

of bearing.

Coat five rotor blades (16) with ARO 29665 spindle oil and as-

semble to rotor slots - straight side out.

Coat i.d. of cylinder (18) with ARO 29665 spindle oil and as-

semble over rotor. NOTE: Air inlet slots in end of cylinder must

be aligned with two air inlet holes in end plate (15).

Assemble bearing (20) to end plate (19). NOTE: Press on out-

er race of bearing.

Assemble end plate (19) to rotor. NOTE: Press on inner race

of bearing. Be sure rotor turns without binding.

Insert locating pin (23) into .081" diameter blind hole at bottom

of motor cavity in housing.

Align notches of end plates and cylinder and install motor into

housing, aligning notches with locating pin (23).

Grease and assemble "0" ring (21) to end plate (19).

Assemble spacer (22) to motor, with chamfer facing motor.

Assemble gearing and right-angle section to tool.

HOUSING DISASSEMBLY

Clamp air inlet adapter (2) in a smooth face vise.

Unthread housing (9) with a strap type wrench.

Remove spacer (3) washer (4) exhaust cap (5) muffler pad

(6) spring (7) and valve rod (8). CAUTION: Do not remove or

adjust rubberportion of valve rod (8) as it is preset at the facto-

Remove screen (1) from inlet adapter (2).

Remove throttle pin (11) and spring (10).

Models DR025B-( ) - Do not remove restrictor (83) unless

damage is evident.

HOUSING ASSEMBLY

Lubricate throttle pin (11) with ARO 29665 spindle oil.

Install spring (10) and throttle pin (11) into housing. NOTE:

Align slot in throttle pin with air inlet holes in housing.

Install valve rod assembly (6) into housing. NOTE: Throttle pin

(11) should not pull out when valve rod (8) is seated properly.

Install muffler pad (6) to exhaust cap (5).

Install exhaust cap (5) to housing, aligning lever with throttle

pin (11).

Assemble spring (7) washer (4) and spacer (3) to tool, secur-

ing with inlet adapter (2).

Clean and replace screen (1) in inlet adapter (2).

Models DR025B-( ) - Grease and assemble "0" ring (84) to

restrictor (83) and assemble to housing (9) with opening of re-

strictor positioned towards motor. Secure restrictor with retain-

ing ring (85).

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